<template>
  <view class="uv-line" :style="[lineStyle]"></view>
</template>

<script>
import mpMixin from '@/uv-ui/components/uv-ui-tools/libs/mixin/mpMixin.js'
import mixin from '@/uv-ui/components/uv-ui-tools/libs/mixin/mixin.js'
import props from './props.js'
/**
 * line 线条
 * @description 此组件一般用于显示一根线条，用于分隔内容块，有横向和竖向两种模式，且能设置0.5px线条，使用也很简单
 * @tutorial https://www.uvui.cn/components/line.html
 * @property {String}			color		线条的颜色 ( 默认 '#d6d7d9' )
 * @property {String | Number}	length		长度，竖向时表现为高度，横向时表现为长度，可以为百分比，带px单位的值等 ( 默认 '100%' )
 * @property {String}			direction	线条的方向，row-横向，col-竖向 (默认 'row' )
 * @property {Boolean}			hairline	是否显示细线条 (默认 true )
 * @property {String | Number}	margin		线条与上下左右元素的间距，字符串形式，如"30px"  (默认 0 )
 * @property {Boolean}			dashed		是否虚线，true-虚线，false-实线 (默认 false )
 * @property {Object}			customStyle	定义需要用到的外部样式
 * @example <uv-line color="red"></uv-line>
 */
export default {
  name: 'uv-line',
  mixins: [mpMixin, mixin, props],
  computed: {
    lineStyle() {
      const style = {}
      style.margin = this.margin
      // 如果是水平线条，边框高度为1px，再通过transform缩小一半，就是0.5px了
      if (this.direction === 'row') {
        // 此处采用兼容分开写，兼容nvue的写法
        style.borderBottomWidth = '1px'
        style.borderBottomStyle = this.dashed ? 'dashed' : 'solid'
        style.width = this.$uv.addUnit(this.length)
        if (this.hairline) style.transform = 'scaleY(0.5)'
      } else {
        // 如果是竖向线条，边框宽度为1px，再通过transform缩小一半，就是0.5px了
        style.borderLeftWidth = '1px'
        style.borderLeftStyle = this.dashed ? 'dashed' : 'solid'
        style.height = this.$uv.addUnit(this.length)
        if (this.hairline) style.transform = 'scaleX(0.5)'
      }
      style.borderColor = this.color
      return this.$uv.deepMerge(style, this.$uv.addStyle(this.customStyle))
    },
  },
}
</script>

<style lang="scss" scoped>
.uv-line {
  /* #ifndef APP-NVUE */
  vertical-align: middle;
  /* #endif */
}
</style>
